, impairment cost for business at Malaysia and computer expenses to develop Omnichannel platform, offset with the decrease of personnel cost, management fee and maintenance expense from the cost control measure

increase of 58.0% mainly due to the maintenance fee project, which is paid in advance and covered more than one year of insurance. Liabilities Items which has significant changes Outstanding by Quarter

9.4%QoQ from higher base rental & utility as well as maintenance from 5G/4G network expansion.  Other costs of service were Bt2,111mn, increasing 1%YoY and 8%QoQ from higher value added services cost

service quality and integrated bundling through service guarantee such as 24hr maintenance and on-time arrival. Mobile Business 2Q20 1Q21 2Q21 %YoY %QoQ Subscribers Postpaid 9,536,400 10,634,800 10,986,500

% (4.6%) 76.2 73.9 (3.0%) Repair and maintenance cost 40.3 59.4 54.8 (7.7%) 36.0% 84.6 114.2 35.0% Engineering and other services 29.4 40.9 40.8 (0.2%) 38.8% 60.0 81.7 36.2% Processing fee - PEA 13.9 13.3

IT automation, enabling autonomous monitoring, maintenance, predictive data analytics, and artificial intelligence capabilities. With these, we emphasize driving growth in core service revenue across

165.8 169.1 169.3 171.4 2.1 1.2% 624.1 675.6 51.5 8.3% Staff cost, repair and maintenance cost and other services 134.3 153.4 152.1 157.2 5.1 3.4% 540.9 597.0 56.1 10.4% Processing fee - PEA 16.0 16.2

%) (21.2%) 2,606.5 2,491.1 (4.4%) Depreciation and amortisation cost 169.3 177.9 180.0 1.2% 6.3% 504.2 531.4 5.4% Staff cost, repair and maintenance cost and other services 152.1 162.1 145.2 (10.4%) (4.5

duration, resulting in a shortened estimated useful lives. (6) Repair and maintenance expenses, increased by THB 11.10 million from renovation of existing branches. (7) Other expenses included supplies

and amortisation cost 173.4 177.9 180.0 176.7 (3.3) (1.8%) 675.6 708.0 32.4 4.8% Staff cost, repair and maintenance cost and other services 142.9 162.1 145.2 161.1 15.9 11.0% 597.0 611.3 14.3 2.4